kvargs: use SPDX tags

[dpdk.git] / lib / librte_hash / rte_crc_arm64.h

diff --git a/lib/librte_hash/rte_crc_arm64.h b/lib/librte_hash/rte_crc_arm64.h
index 02e26bc..b4628cf 100644 (file)
--- a/lib/librte_hash/rte_crc_arm64.h
+++ b/lib/librte_hash/rte_crc_arm64.h
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2015 Cavium networks. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Cavium networks nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2015 Cavium, Inc
  */
 
 #ifndef _RTE_CRC_ARM64_H_
@@ -49,10 +20,29 @@ extern "C" {
 #include <rte_branch_prediction.h>
 #include <rte_common.h>
 
+static inline uint32_t
+crc32c_arm64_u8(uint8_t data, uint32_t init_val)
+{
+       __asm__ volatile(
+                       "crc32cb %w[crc], %w[crc], %w[value]"
+                       : [crc] "+r" (init_val)
+                       : [value] "r" (data));
+       return init_val;
+}
+
+static inline uint32_t
+crc32c_arm64_u16(uint16_t data, uint32_t init_val)
+{
+       __asm__ volatile(
+                       "crc32ch %w[crc], %w[crc], %w[value]"
+                       : [crc] "+r" (init_val)
+                       : [value] "r" (data));
+       return init_val;
+}
+
 static inline uint32_t
 crc32c_arm64_u32(uint32_t data, uint32_t init_val)
 {
-       asm(".arch armv8-a+crc");
        __asm__ volatile(
                        "crc32cw %w[crc], %w[crc], %w[value]"
                        : [crc] "+r" (init_val)
@@ -63,7 +53,6 @@ crc32c_arm64_u32(uint32_t data, uint32_t init_val)
 static inline uint32_t
 crc32c_arm64_u64(uint64_t data, uint32_t init_val)
 {
-       asm(".arch armv8-a+crc");
        __asm__ volatile(
                        "crc32cx %w[crc], %w[crc], %x[value]"
                        : [crc] "+r" (init_val)
@@ -88,20 +77,63 @@ rte_hash_crc_set_alg(uint8_t alg)
        case CRC32_ARM64:
                if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32))
                        alg = CRC32_SW;
+               /* fall-through */
        case CRC32_SW:
                crc32_alg = alg;
+               /* fall-through */
        default:
                break;
        }
 }
 
 /* Setting the best available algorithm */
-static inline void __attribute__((constructor))
-rte_hash_crc_init_alg(void)
+RTE_INIT(rte_hash_crc_init_alg)
 {
        rte_hash_crc_set_alg(CRC32_ARM64);
 }
 
+/**
+ * Use single crc32 instruction to perform a hash on a 1 byte value.
+ * Fall back to software crc32 implementation in case arm64 crc intrinsics is
+ * not supported
+ *
+ * @param data
+ *   Data to perform hash on.
+ * @param init_val
+ *   Value to initialise hash generator.
+ * @return
+ *   32bit calculated hash value.
+ */
+static inline uint32_t
+rte_hash_crc_1byte(uint8_t data, uint32_t init_val)
+{
+       if (likely(crc32_alg & CRC32_ARM64))
+               return crc32c_arm64_u8(data, init_val);
+
+       return crc32c_1byte(data, init_val);
+}
+
+/**
+ * Use single crc32 instruction to perform a hash on a 2 bytes value.
+ * Fall back to software crc32 implementation in case arm64 crc intrinsics is
+ * not supported
+ *
+ * @param data
+ *   Data to perform hash on.
+ * @param init_val
+ *   Value to initialise hash generator.
+ * @return
+ *   32bit calculated hash value.
+ */
+static inline uint32_t
+rte_hash_crc_2byte(uint16_t data, uint32_t init_val)
+{
+       if (likely(crc32_alg & CRC32_ARM64))
+               return crc32c_arm64_u16(data, init_val);
+
+       return crc32c_2bytes(data, init_val);
+}
+
 /**
  * Use single crc32 instruction to perform a hash on a 4 byte value.
  * Fall back to software crc32 implementation in case arm64 crc intrinsics is